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Curvature Quintessence

2002/01/10 by Salvatore Capozziello, Salvatore Capozzıello, SALVATORE CAPOZZIELLO · 147 citations
Physics and Astronomy · #Advanced Differential Geometry Research #Cosmology and Gravitation Theories #Relativity and Gravitational Theory #gr-qc

paper · pdf · doi:10.1142/s0218271802002025

published as Int.J.Mod.Phys.D11:483-492,2002 · 10 pages, LATEX files, to appear on IJMPD

arxiv created 2002/01/10 · arxiv updated 2009/11/30

Abstract

The issues of quintessence and cosmic acceleration can be discussed in the framework of higher order theories of gravity. We can define effective pressure and energy density directly connected to the Ricci scalar of curvature of a generic fourth order theory and then ask for the conditions to get an accelerated expansion. Exact accelerated expanding solutions can be achieved for several fourth order theories so that we get an alternative scheme to the standard quintessence scalar field, minimally coupled to gravity, usually adopted. We discuss also conformal transformations in order to see the links of quintessence between the Jordan and Einstein frames.

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